Show HN: A file transfer protocol for after the internet dies

By ducklin404 · 2026-07-09 · 3 points · 0 comments

Built this for the day the internet and every normal way of moving a file stop being an option. Two webcams, QR codes flashing between them, nothing else. The protocol handles reliability with a sliding-window ACK/retry scheme, and does ECDH key exchange with fingerprint ve…

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